Printing telegraph apparatus



June 20, 1944. E E 2,352,155

PRINTING TELEGRAPH APPARATUS Original Filed June 14, 1941 3 Sheets-Sheetl VINVENTOR ALBERT H. REIBER fORNEY June 20, 1944. RE|BER 2,352,155

PRINTING TELEGRAPH APPARATUS Original Filed June 14, 1941 3 Sheets-Sheet2 FIG. 2 p

FIG.3

- INVFNTOR ALBERT H. REIBER ATTOR N June 20, 1944. E E 2,352,155

PRINTING TELEGRAPH APPARATUS Original Filed June 14, 1941 s SheetS-Sheet s I VIIVI-D k INVENTOR ALBERT H. REIBER Patented June 20, 19442,352,155 PRINTING TELEGRAPH APPARATUS Albert II. Beiber, Evanston, typeCorporation, Chicago, Ill.,

of Delaware Original application June 14, 398,074, which is a divisionof No. 77,796, May 4, 1936, 2,296,875, dated September 29, 1942. andthis application November 9, 1942 Ili., assignor to Telea corporation1941, Serial No. application Serial now Patent No. Divided Serial '1Claims. (01. 191-43) This invention pertains to typ Printing apparatusand particularly to printing mechanism therefor,

This application is a division of copending application Serial No.398,074 filed June 14, 1941,

' which in turn is a division of application Serial No. 77,796 filed May4, 1936. Application Serial No. 77,796 has matured into Patent No.2,296,875 on September 29, 1942.

The principal object of the invention is to embody in a printing apparatfeatures which are conducive to reliable and eilicient operation.

The present invention features a printer having a type wheel providedwith a plurality of re-' ciprocable type elements, and a printingmechanism comprising a print hammer for effecting printing from saidelements operated by an arm from a striker member having a weighted headand a depending arm which is engaged by a lateral abutment on a camreciprocated bar.

For a more complete understanding of the invention reference may be hadto the following detailed description, taken in conjunction with theaccompanying drawings in which,

Fig. 1 is a side elevational view of the receiving and printingmechanism according to the present invention Fig. 2 is a verticalsectional view through the receiving and printing mechanism;

Fig. 3 is an elevational view of a modified print hammer operatingmechanism; and

Fig. 4 is a horizontal sectional view showing the printing functionperforming mechanism.

Having reference to Fig. 1, the base casting I6 removably supports thefoundation for a receiving printer comprising a vertically extendingframe casting 36 and a frame casting 31 secured to the casting 36. Theframe casting 36 extends from front to rear of the base casting I6 andthe casting 31 extends transversely thereof. The frame casting 36 hassecured thereto bearing blocks 38 which rotatably support a shaft 39,Fig. 2. Shaft 39 has secured thereto a gear II (Figs. 1 and 2) which isdriven by a spiral gear 42 (Fig. 2) which is mounted on the rotor shaftof motor (not shown) and constitutes the main driving gear of thereceiving printer as well as of the transmitting mechanism. The shaft 39actuates the selector mechanism of the receiving printer and also theoperation performing cams.

The driving gear 42 (Fig. 2) also meshes with a gear 43 which is mountedon a shaft 44 and is operatively connected thereto through a frictionclutch 46. Shaft 44 is journalled in a code disc selector mechanismindicated generally by the 55. A Printing hammer reference numeral 41(Fig. 2) which is removably supported on the frame member 86.

The type wheel shaft ll has a reduced portion ill at the upper endthereof which provides a shoulder I22 (Fig. 2). A hub I22 is journalledon the reduced portion I2I of shaft 44 and is slidable thereon. At itsupper end the hub I23 carries a disc I24 to which is secured an annulartype wheel frame I26. The frame I26 has slots in radial arrangementequally spaced therearound, and in each of the slots upper ard lowertype pallets I21 are slidably disposed. The type pallets I21 arearranged in upper and lower annular rows, one row of which may carry anydesired group of characters such as letters and the other of which maycarry other characters such as figures and punctuation marks. The typepallets comprise type faces I28 to which are secured thin shanks I28which extend inwardly and radially of the type wheel structure withinthe radial slots thereof. The shanks of each annular row of type palletsare notched to receive a garter spring I3I which biases all of the typepallets of an annular row to their innermost positions with the typefaces I28 disposed about the peripher'y of the slotted frame I26. Anannular ring- I32 is floatingly disposed in the notches in both annularrows of type pallets and prevents the type pallets from accidentaldisplacement from the type wheel structure due to centrifugal force inthe event that one of the garter springs I3I should break. At oneportion of its periphery, the type wheel structure has no type palletsand at that point the disc I24 and frame I26 are provided with recessesin which is disposed a perpendicular portion. I33 of a type wheeldriving arm I34 which is ajustably secured by screws I30 to an arm Iwhich is carried by the type wheel shaft ll at the top thereof in fixedrelation to the shaft to be driven thereby. The adjustability betweenthe arms I36 and I36 is angular.

The type wheel structure is slidable longitudinally of the type wheelshaft to bring either of the two rows of type pallets into printingalignment with the printing platen, the shifting of the structure beingaccomplished by a sliding movement of the hub I23 with respect to thetype wheel shaft 44 produced by the shift mechanism described in saidapplication Serial No. 398,074. As the type wheel is shifted, therecesses in which the perpendicular portion I33 of driving arm I34 isdisposed slides upon the portion I33 and driving relation between thetype wheel shaft and the type wheel is maintained. I36 is pivotallymounted on screws I31 threaded into the, stationary bracket I25 (Fig. 2)and has its head in alignment with the printing position so that it isdisposed behind the shank of the type pallet of either of the annularrows of type pallets, depending upon whether the type wheel is in itsupper or lower position. The printing hammer I36 has integral therewitha bail portion H9 at the opposite end of which is integrally formed alever arm lll (Fig, 1) which carries an impact receiving member I38. Alimit screw H8 limits the operative movement of lever arm I. The leverarm III is actuated by a striker member to be described later. Theoperative movement of the print hammer I36 is a sudden clockwiserotation as viewed in Fig. 2, whereby the type pallet which is alignedwith the print hammer at the moment is driven outwardly and radially ofthe type wheel structure into engagement with the printing platen I39. Astop bar I20 mounted on top of the bracket-.125 projects into the pathof the hammer I36 and limits the movement thereof.

The operation of the print hammer lever III is effected by an operatingcam mounted on the shaft 39 above the gear 4! (Fig. 1). The operatingcams are assembled in-fixed relation with respect to each other on asleeve which is mounted on shaft 39 and which has associated therewiththe driven portion of a spring loaded tooth clutch 2| l, the drivingportion of which is keyed or staked to shaft 39. A clutch throwout lever2l2 pivotally mounted on shaft 2i3 is spring biased into engagement withthe driven portion of the clutch 2H and has an arm 2 (Fig. 2) disposedin the path of a cam projection 2: included on the selector cam barrel62. With this arrangement, at a given point in the cycle of operation ofthe cam barrel 62. cam projection 2H! rocks the arm 2 which withdrawsthe clutch throwout lever 2i2 from restraining engagement with thedriven portion of the clutch 2H and permits driving engagement to beestablished between the shaft 39 and the cams mounted thereon.

The uppermost of the cams is a channel or box cam designated by thereference numeral 2l6, the cam groove 2" (Figs. 2 and 4) of whichreceives the follower roller 2| 8 rotatably mounted on a bell cranklever 2l9 rockably mounted on the pivot shaft 22L The bell crank lever219 is articulated at 222 to a bar 223 to which it is arranged to imparta reciprocatory motion due to the fact that the cam groove 2|! has oneoffset 224 which, when encountered by the follower roll 2l8, causes thelever M9 to rock counterclockwise upon its mounting shaft HI and in thisway the bar 223 is reciprocated rearwardly of the typing unit.

The bar 223 carries intermediate its ends an eccentrically mountedabutment 230 against which abuts the-operating arm 229 of a strikermember or hammer 23] pivotally mounted at 232 (Fig. 1). The bar 223 hasa depending lug 220, and a tension spring 225 has one end connected tothe lug 220 and the other end connected to the operating arm 229 ofstriker 23l. The striker member 23l is provided at its upper end with amassive head 233 which describes an arc as the hammer 23! is rocked andwhich delivers a sharp blow to an impact receiving abutment I38 ofresilient material, such as rubber or leather, carried by the printhammer operating lever arm 'I I1. As indicated in Fig. 4, the oflset 224in the groove 2| 1 of cam 2l6 is very abrupt and very 2,352,155 rearmostposition is very rapid and thus the blow imparted by the striker member23] to the print hammer operating lever arm II! is very sharp.

Modified printing mechanism In Fig. 3 there is shown a modifiedarrangement for operating the printing striker member 23l. In thisarrangement, the arm 229 of the striker member 23l, instead of beingdisposed behind the eccentric abutment 228 as in the previouslydescribed arrangement, is disposed ahead of it so that upon theoperating stroke of the bar 223, the abutment 228 tends to move awayfrom operating engagement with the striker member short, so that thereciprocation of bar 223 to its .75

23| and upon the return stroke, the abutment 228 operates against arm229 to restore the striker member 23l to its unoperated position. Thebar 223 is provided with lug 46l upon which is pivoted lever 462. Theupper arm 463 of lever 462 abuts the foremost surface of striker lever229 and the lower arm 464 of the lever 482 has connected to it therearmost end of tension spring 225 which, in the previously describedarrangement, was connected to the striker arm 229. The arm 229 ofstriker 23l is thus between the eccentric abutment 228 and the arm 83 oflever 462. The operation of this arrangement differs from that of thepreviously described arrangement in that the striker member 23l isoperated by the combined action of the operating bar 223 and spring 225and is restored by action of the abutment 228, whereas in the previouslydescribed arrangement, the striker 23l is operated by the bar 223through abutment 228 and is restored to unoperated position by thetension spring 225. The specific details of the operattion of thearrangement shown in Fig. 3 are as follows: When the operating bar 223is reciprocated to the right, the abutment 228 tends to move away fromthe arm 229 of striker 2M and the lever 462 tends to be rotatedcounterclockwise, increasing the tension of spring 225, both of theseactions resulting from the inertia of the relatively heavy strikermember 23!, which tends to remain unmoved. When the inertia of thatmember is overcome, the striker 23! is operated very sharply, due to theenergy stored in the spring 225. The striker 23| is positively broughtto its idle or rest position upon the return movement of the bar 223,

What is claimed is:

1. In a printing apparatus, a type wheel having a. plurality ofreciprocable type elements, a print hammer rockable to strike andreciprocate said type elements, an impact receiving arm for said printhammer, an inertia device having a weighted head for imparting movementto said impact receiving arm, a reciprocable bar for operating saidinertia device, and a power driven cam for operating said reciprocablebar.

2. In a printing apparatus, a type wheel having reciprocable typeelements, a print hammer for efi'ecting printing from said elements, anoperating arm for said print hammer, a striker member for said operatingarm having a weighted head and a depending arm, a reciprocable barhaving a lateral abutment to engage said depending arm, and an operatingcam for said bar.

3. In a printing apparatus, a type wheel having reciprocable typeelements, a print hammer for eifecting printing from said type elements.an operating arm for said print hammer, a striker member forsaidoperating arm having a weighted head and a depending arm, a reciprocablebar having a fixed abutment and a yieldab'le abutment for controllingsaid striker member, and an operating cam for imparting movement to saidreciprocable ban.

4. In a printing apparatus, a type wheel hav-- ing reciprocable typeelements, a print hammer, an operating arm therefor, a striker memberfor imparting movement to said operating arm having a depending arm, anda reciprocable bar having a yieldable abutment for operating thedepending arm of said striker member and having a fixed abutment forrestoring the depending arm to normal position.

5. In a printing apparatus, a type wheel having reciprocable typeelements, a print hammer i'or efiecting printing from said type element,an operating arm for said print hammer, a striker member for saidoperating arm having a depending arm, a reciprocable bar, a rotatableabutment carried by said bar for engagement with said depending arm, aspring connected between said abutment and said bar for storing energyfor operating said depending arm, and a fixed abutment for restoringsaid depending arm to normal position.

6. In a printing apparatus, a type wheel having a plurality oi!reciproeable type elements, a print hammer rookable to strike andreciprocate said type elements, means for operating said print hammer,an energy storing and releasin means through which movement is impartedto said means, a reciprocable means for actuating said energy storingand releasing means, and power operated means for operating saidreciprocable means.

7. In a printing apparatus, a type wheel having a plurality ofreciprocable type elements, a print hammer rockable to strike andreciprocate said type elements, said print hammer comprising an impactreceiving arm, an inertia device effective through said arm to operatesaid print hammer, an energy storing and releasing means through whichmovement is imparted to said inertia device, a reclprocable means foracutat- 20 ing said energy storing and releasing means, and

power operated, means for operating said reciprocable means.

ALBERT H. REIBER.

cnnmz'cnz. OF comc'rxon.

Patent No. 2,352,155. June 20, 19M].

ALBERT H. REIBER.

It 1.5 hereby certified that error ap aeara in the above numbered patentrequiring correction as follows: lathe-heading tq the printedspecificatibn,- l1n'o 9,'and page 1, firstcoluinn', line 8, for thepatent number 2,296,875 read --2,296,87LL--; and thatthe saidLettera.-Patentahou1d bq' readwiflz this v(solar-autumn thereinrthatthesame niw conform to the m- 0rd at the case in the Patent Off-ice.

Signed ma aea1o d ih 1al2th day of September, A. 1). 191m.

Leslie Frazer (Seal) Acting Comhzisaioziar of Patents.

